Hello. Some small changes that I found useful.

[]removed "android." from some layout IDs;
[]added `getDialogView()` method;
[]in `setItems` method, changed `itemList.setOnClickListener` to `listItem.setOnClickListener`;
[]added copyright notice in `QustomDialogBuilder.java`
[]slightly modified `qustom_dialog_layout.xml`
[]removed `bin` and `gen` folders